Lecture 10, The Castle of Giant Despair:

The pilgrimage of the Christian life carries the believer through all types of terrain. After escaping from persecution at Vanity Fair, Christian journeyed onward, sharing the joys and difficulties of the road with Hopeful, a new fellow pilgrim. Choosing to depart from the king’s highway in order to follow an easier path, the travellers soon found themselves imprisoned in Doubting Castle, in what constitutes one of the most dark and profound scenes in Pilgrim’s Progress.